I would definitely not be against such a coalition :-).
I think we already effectively have (more loosely defined than your idea) a global community that is based on various open source efforts. Open source is vitally important (and not much appreciated in the usual ossified power centers) phenomenon as it proves that in many critical nodes of information technology: desktop and mobile OS, desktop apps, browsers, social media, and all sorts of libraries etc you can perfectly well have alternatives that are more in line with societal objectives.
But we have now enough of a track record to know the open source mode cannot scale to provide the backbone that everyone deserves. What is missing is the regulatory framework that will induce (and if needed, force) commercial initiatives to be interoperable, ring fenced, small enough to fear and respect clients and users, the opposite of the too-big-to-fail conglomerates, in short: we need companies that are good digital citizens.